Rheem-Ruud RHC-ZNS4 OEM Room Humidity Sensor for DDC HVAC Systems

The Rheem-Ruud RHC-ZNS4 is a genuine OEM room humidity sensor designed for use with Rheem and Ruud commercial HVAC systems utilizing Direct Digital Control (DDC) architecture. It outputs a 0–10 V signal that transmits real-time relative humidity data directly to the DDC system, enabling precise environmental monitoring and automated humidity management.

By continuously reporting indoor humidity levels, the RHC-ZNS4 allows the HVAC system to maintain optimal indoor air quality, improve occupant comfort, and maximize energy efficiency. Accurate humidity control helps prevent condensation, inhibit mold growth, and protect building materials from moisture-related deterioration.

Key Features:

• 0–10 V analog output transmits humidity reading to DDC system
• Genuine Rheem-Ruud OEM replacement part
• Flush-mount, wall-mount room installation design
• Compatible with Rheem ClearControl™ networked DDC applications
• Monitors and regulates indoor relative humidity in commercial and industrial environments
• Compact design for straightforward installation
• Supports energy-saving HVAC performance through accurate humidity data

The RHC-ZNS4 is a model-specific OEM component and is not a universal or generic sensor. It is engineered to integrate seamlessly with compatible Rheem-Ruud rooftop and air handling units as part of a complete DDC zone sensing solution.